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Liu S, Sun M, Wu C, Zhu K, Hu Y, Shan M, Wang M, Wu K, Wu J, Xie Z, Tang H. Fabrication of Loose Nanofiltration Membrane by Crosslinking TEMPO-Oxidized Cellulose Nanofibers for Effective Dye/Salt Separation. Molecules 2024; 29:2246. [PMID: 38792108 PMCID: PMC11123938 DOI: 10.3390/molecules29102246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 05/06/2024] [Accepted: 05/08/2024] [Indexed: 05/26/2024] Open
Abstract
Dye/salt separation has gained increasing attention in recent years, prompting the quest to find cost-effective and environmentally friendly raw materials for synthesizing high performance nanofiltration (NF) membrane for effective dye/salt separation. Herein, a high-performance loose-structured NF membrane was fabricated via a simple vacuum filtration method using a green nanomaterial, 2,2,6,6-tetramethylpiperidine-1-oxide radical (TEMPO)-oxidized cellulose nanofiber (TOCNF), by sequentially filtrating larger-sized and finer-sized TOCNFs on a microporous substrate, followed by crosslinking with trimesoyl chloride. The resulting TCM membrane possessed a separating layer composed entirely of pure TOCNF, eliminating the need for other polymer or nanomaterial additives. TCM membranes exhibit high performance and effective dye/salt selectivity. Scanning Electron Microscope (SEM) analysis shows that the TCM membrane with the Fine-TOCNF layer has a tight layered structure. Further characterizations via Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) confirmed the presence of functional groups and chemical bonds of the crosslinked membrane. Notably, the optimized TCM-5 membrane exhibits a rejection rate of over 99% for various dyes (Congo red and orange yellow) and 14.2% for NaCl, showcasing a potential candidate for efficient dye wastewater treatment.
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Affiliation(s)
- Shasha Liu
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, China; (S.L.); (M.S.); (C.W.); (K.Z.); (Y.H.); (M.S.); (M.W.); (K.W.); (J.W.)
| | - Mei Sun
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, China; (S.L.); (M.S.); (C.W.); (K.Z.); (Y.H.); (M.S.); (M.W.); (K.W.); (J.W.)
| | - Can Wu
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, China; (S.L.); (M.S.); (C.W.); (K.Z.); (Y.H.); (M.S.); (M.W.); (K.W.); (J.W.)
| | - Kaixuan Zhu
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, China; (S.L.); (M.S.); (C.W.); (K.Z.); (Y.H.); (M.S.); (M.W.); (K.W.); (J.W.)
| | - Ying Hu
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, China; (S.L.); (M.S.); (C.W.); (K.Z.); (Y.H.); (M.S.); (M.W.); (K.W.); (J.W.)
| | - Meng Shan
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, China; (S.L.); (M.S.); (C.W.); (K.Z.); (Y.H.); (M.S.); (M.W.); (K.W.); (J.W.)
| | - Meng Wang
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, China; (S.L.); (M.S.); (C.W.); (K.Z.); (Y.H.); (M.S.); (M.W.); (K.W.); (J.W.)
| | - Kai Wu
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, China; (S.L.); (M.S.); (C.W.); (K.Z.); (Y.H.); (M.S.); (M.W.); (K.W.); (J.W.)
| | - Jingyi Wu
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, China; (S.L.); (M.S.); (C.W.); (K.Z.); (Y.H.); (M.S.); (M.W.); (K.W.); (J.W.)
| | - Zongli Xie
- CSIRO Manufacturing, Private Bag 10, Clayton South, VIC 3169, Australia
| | - Hai Tang
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, China; (S.L.); (M.S.); (C.W.); (K.Z.); (Y.H.); (M.S.); (M.W.); (K.W.); (J.W.)
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Zhang K, Wu H, Zhang X, Dong H, Chen S, Xu Y, Xu F. Bacterial nanocellulose membrane with opposite surface charges for large-scale and large-area osmotic energy harvesting and ion transport. Int J Biol Macromol 2024; 260:129461. [PMID: 38237827 DOI: 10.1016/j.ijbiomac.2024.129461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 12/27/2023] [Accepted: 01/11/2024] [Indexed: 01/21/2024]
Abstract
How to optimize ion-exchange membrane materials has been the key for researchers recently working on the use of reverse electrodialysis to harvest osmotic energy. Based on the considerations of improving membrane performance and conversion to large-area industrial production, this work first proposes an easy-industrialized strategy to treat bacterial cellulose membranes by hot pressing and hot pressing with etherification modification, and then to obtain anion-selective and cation-selective membrane pairs (PBC-M and NBC-M) with opposite charges. The PBC-M obtained by multi-step treatment has excellent hydrophobicity, good surface charge density, and more favorable nanochannel size for the functioning of double layer. The maximum output power density of 44.1 mW m-2 was obtained in artificial river water and seawater simulated salinity gradient power generation. Applied to a larger test area, the power output of the system where a single membrane is located can reach 2.2 × 10-3 mW, which is ahead of similar experimental products. The two membranes prepared can also be used in combination, which provides a new idea for full cell design. It's important to open up a new route for optimizing nanofluidic channel design, regulating ion flux transport, and advancing the large-scale industrialization of biomass nanofluidic membrane RED system.
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Affiliation(s)
- Kejian Zhang
- Beijing Key Laboratory of Lignocellulosic Chemistry, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing, 100083, PR China
| | - Hongqin Wu
- Beijing Key Laboratory of Lignocellulosic Chemistry, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing, 100083, PR China
| | - Xiao Zhang
- Beijing Key Laboratory of Lignocellulosic Chemistry, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing, 100083, PR China
| | - Huilin Dong
- Beijing Key Laboratory of Lignocellulosic Chemistry, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing, 100083, PR China
| | - Shen Chen
- Beijing Key Laboratory of Lignocellulosic Chemistry, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing, 100083, PR China
| | - Yanglei Xu
- Beijing Key Laboratory of Lignocellulosic Chemistry, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing, 100083, PR China; Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, PR China.
| | - Feng Xu
- Beijing Key Laboratory of Lignocellulosic Chemistry, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing, 100083, PR China; Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, PR China.
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Chaw Pattnayak B, Krishna VS, Sahu BK, Mohapatra S. Reusable Floating Spherical Hydrogel Evaporator for Solar Desalination with Salt Mitigation and Contaminant Elimination. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:18663-18671. [PMID: 38063076 DOI: 10.1021/acs.langmuir.3c03174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2023]
Abstract
The generation of clean and drinkable fresh water from seawater and contaminated water holds great potential to mitigate water scarcity. Herein, a floating spherical hydrogel evaporator (SHE) is designed to achieve sunlight-driven desalination, self-salt cleaning, and removal of environmental contaminants. The spherical lightweight polystyrene is coated with a porous carbon-embedded sodium alginate/PVA/CMC photothermal hydrogel to generate a spherical hydrogel evaporator (SHE) that floats naturally. The SHE is very sensitive to the weight imbalance (500 mg) and can respond quickly to the accumulation of salt by rotation to the fresh evaporation surface, realizing excellent antisalt fouling performance. Remarkably, with energy localization by porous carbon, the spherical floating evaporator achieved a high evaporation rate of 2.65 kg m-2 h-1 with an evaporation efficiency of 98%. At the same time, SHE is also capable of adsorbing both organic contaminants and heavy metal ions through functional groups of the hydrogel, attaining 99% removal efficiency. Overall, this low-cost spherical floating evaporator may offer solution for eco-friendly and sustainable production of fresh water on a large scale.
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Affiliation(s)
- Bibek Chaw Pattnayak
- Department of Chemistry, National Institute of Technology, Rourkela, Odisha 769008, India
| | - V Saimohana Krishna
- Department of Chemistry, National Institute of Technology, Rourkela, Odisha 769008, India
| | - Bikash K Sahu
- Department of Chemistry, National Institute of Technology, Rourkela, Odisha 769008, India
| | - Sasmita Mohapatra
- Department of Chemistry, National Institute of Technology, Rourkela, Odisha 769008, India
- Centre for Nanomaterials, National Institute of Technology, Rourkela, Odisha 769008, India
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